"She's just amazing and she's lovely to look at as well when you're singing!" Perrie explained. "She's beautiful.

"She's very constructive," Jade Thirlwall continued. "She was never nasty or mean.

"If she had something negative to say, it was only to help you," Jade added. " I think she's one of the best judges that's been on the show."

Check out a picture of Little Mix out in America promoting their album 'DNA' below:

Kelly Rowland is currently preparing to return with her new solo album 'Talk A Good Game', and recently debut a brand new song called 'Dirty Laundry' which explores her professional jealousy of Destiny's Child bandmate Beyonce.

Little Mix are currently out in America promoting their music after the huge chart success of their album 'DNA' there.